US4974860A - Sealing device - Google Patents
Sealing device Download PDFInfo
- Publication number
- US4974860A US4974860A US07/362,870 US36287089A US4974860A US 4974860 A US4974860 A US 4974860A US 36287089 A US36287089 A US 36287089A US 4974860 A US4974860 A US 4974860A
- Authority
- US
- United States
- Prior art keywords
- rotary shaft
- slinger
- sealing device
- stationary part
- rubber seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
- F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
- F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/324—Arrangements for lubrication or cooling of the sealing itself
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/344—Pressing means the pressing force being applied by means of an elastic ring supporting the slip-ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3456—Pressing means without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip
Definitions
- the present invention relates to a sealing device and, more particularly, to a sealing device which suffers from reduced wear and which is capable of improving sealing effect.
- a sealing device is disposed between a stationary part and a rotary shaft such that the sealing device is penetrated by the rotary shaft so as to provide a seal in the gap between the rotary shaft and the stationary part.
- FIGS. 4 to 6 illustrate the construction of a typical example of the sealing device of the kind described.
- the sealing device shown in these Figures has a slinger 43 composed of a tubular portion 43b through which the rotary shaft 41 extends and a radial portion 43a provided on one axial end of the tubular portion 43b and extending radially outwardly therefrom, and a rubber seal 45 which is disposed on the outer side of the tubular portion 43b of the slinger 43.
- the rubber seal 45 has a reinforcement member 44 embedded therein.
- the reinforcement member has a substantially L-shaped cross-section with one leg 44a thereof being directed towards the slinger 43.
- the rubber seal 45 has outer peripheral surface fitting in the bore in the stationary part 42, and is provided, at its portion near the end of the reinforcement member 44 adjacent the slinger 43, with a lip 45a contacting the radial portion 43a of the slinger 43 and a lip 45b which is directed towards the tubular portion 43b on the rotary shaft 41.
- a spiral groove 46 starting at the center and terminating at the peripheral end is formed in the surface of the radial portion 43a of the slinger 43 facing the lip 45a.
- the slinger 43 rotates together with the rotary shaft 41 as a unit therewith, with the lip 45a of the rubber seal 45 keeping a sliding contact with the radial portion 43a of the slinger 43 thereby attaining a sealing effect.
- the spiral groove 46 formed in the radial portion 43a of the slinger 43 serves to displace the oil radially outwardly during rotation of the slinger 43 as shown in FIG. 6.
- the pressure at which the lip 45a contacts with the slinger 43 is kept constant regardless of the rotation speed 41 of the rotary shaft 41.
- the lip 45a is rapidly worn down due to sliding contact with the radial portion 43a of the slinger 43 during rotation of the rotary shaft 41, thus impairing durability of the sealing device, and the load torque is undesirably increased as the rotation speed increases.
- an object of the present invention is to provide a sealing device in which the sliding frictional resistance between the lip and the slinger is reduced to suppress the wear of the lip.
- Another object of the present invention is to provide a sealing device in which the load torque produced by the sealing device is reduced during high-speed rotation of the rotary shaft.
- a sealing device adapted to be disposed between a stationary part and a rotary shaft in the stationary part so as to provide a seal in the gap between the stationary part and the rotary shaft
- the sealing device comprising a slinger secured to one of the stationary part and the rotary shaft and a rubber seal secured to the other of the stationary part and the rotary shaft and provided with a lip which makes a resilient pressure contact with the slinger.
- FIG. 1 is a sectional view of a first embodiment of the sealing device in accordance with the present invention, taken at a plane which includes the axis of a rotary shaft on which the sealing device is set;
- FIG. 2 is a sectional view of the sealing device shown in FIG. 1 in a state under the influence of centrifugal force generated as a result of high-speed rotation;
- FIG. 3 is a sectional view of a second embodiment of the sealing device of the present invention.
- FIG. 4 is a sectional view of a known sealing device
- FIG. 5 is a bottom plan view of a slinger incorporated in the sealing device of FIG. 4;
- FIG. 6 is an illustration of the relationship between the slinger and the rubber seal lip.
- FIGS. 1 and 2 show the preferred embodiment of the sealing device in accordance with the present invention.
- the sealing device is composed of a slinger 3 and a rubber seal 5.
- the slinger 3 has a tubular member 14 through which a rotary shaft 1 extends, a ring member 13 on the radially outer side of the tubular member 14 and a resilient member 15 which interconnects the tubular member 14 and the ring member 13.
- the resilient member 15, which interconnects the ring member 13 and the slinger 14, does not extend in the direction perpendicular to the axis of the rotary shaft 1 but extends in a direction which is inclined at a predetermined angle to the direction which is perpendicular to the axis of the rotary shaft 1.
- the rubber seal 5 is provided with a reinforcement member 4 embedded therein.
- the reinforcement member 4 has a substantially L-shaped cross-section with its one leg 4a directed towards the tubular member 14 of the slinger 3.
- the rubber seal 5 surrounds the tubular member 14 of the slinger 3, and has a stepped outer peripheral surface the reduced-diameter portion 5d of which fits in the stationary part 2.
- the rubber seal 5 is provided at its portion adjacent to the slinger 3 with a lip 5a which resiliently contacts with the ring member 13 of the slinger 3 and also with a lip 5b which is directed towards the tubular member 14 of the slinger.
- the rotation of the rotary shaft 1 causes the ring member 13 of the slinger 3 to rotate in sliding contact with the lip 5a of the rubber seal 5 so as to provide a high sealing effect.
- the lip 5a of the rubber seal 5 also deflects from the state shown by broken lines to the state shown by solid lines so as to be kept in contact with the ring member 13 of the slinger 3. In this state, however, the pressure of contact between the lip 5a and the ring member 13 is small as compared with the case where the speed of rotation of the rotary shaft 1 is low. It is therefore possible to maintain the resistance torque at a sufficiently low level even when the rotation speed of the rotary shaft 1 is increased.
- the rubber seal 5 since only the reduced-diameter portion 5d of the rubber seal 5 fits in the stationary part 2 while the large-diameter portion 5c contacts with a side surface of the stationary part 2, the rubber seal 5 is prevented from moving axially even when a force is generated in the axial direction of the rotary shaft 1, thus preventing undesirable axial shift of the sealing device.
- the rubber seal 5 may have a straight outer peripheral surface, i.e., only the reduced-diameter portion 5d which fits in the stationary part 2.
- FIG. 3 shows another embodiment of the sealing device in accordance with the present invention.
- the second embodiment is composed of a rubber seal 25 secured to the rotary shaft 21 and a stationary element 23 secured to the stationary part 22.
- the stationary element 23 has an annular form and is composed of a slant portion 23a and an axial protruding portion 23b protruding in the axial direction of the rotary shaft 21.
- the rubber seal 25 has a tubular portion 25c through which the rotary shaft 21 extends and having a reinforcement member 24 embedded therein, a lip 25a provided on one end of the tubular portion 25c and held in resilient contact with the slant portion 23a of the slinger 23, and a dust strip 25b contacting with the protruding portion 23b.
- the rubber seal 25 rotates as a unit with the rotary shaft 21.
- the lip 25a of the rubber seal 25 rotates in sliding contact with the surface of the slant portion 23a of the stationary element 23 so as to form a reliable seal therebetween. Meanwhile, the dust strip 25b of the rubber seal 25 rotates in sliding contact with the protruded portion 23b of the stationary element 23 so as to prevent dust and other foreign matters from coming into the seal.
- the resistance torque tends to increase.
- centrifugal force acts on the rubber seal 25 which rotates as a unit with the rotary shaft 21 so that the lip 25a of the rubber seal tends to be deflected radially outwardly so as to reduce the pressure with which it is pressed on the surface of the slant portion 23a.
- the contact pressure is materially nullified so as to realize a non-contact state.
- the rubber seal 25 is completely kept out of contact with the stationary element 23 so that the wear of the rubber seal is effectively prevented.
- a comparatively small centrifugal force is generated to reduce the pressure of the resilient contact between the lip 25a and the stationary element 23 as compared with the case where the rotary shaft 21 is not rotating.
- a reliable seal is formed due to the resilient pressure contact between the lip 25a and the stationary element 23 while the wear of the lip 25a is reduced by virtue of the reduced contact pressure.
- the load torque does not increase substantially even when the speed of rotation of the rotary shaft 21 is increased.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
Description
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1988078534U JPH0722532Y2 (en) | 1988-06-14 | 1988-06-14 | Sealing device |
JP63-78534 | 1988-06-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4974860A true US4974860A (en) | 1990-12-04 |
Family
ID=13664578
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/362,870 Expired - Lifetime US4974860A (en) | 1988-06-14 | 1989-06-07 | Sealing device |
US07/362,795 Expired - Lifetime US4986552A (en) | 1988-06-14 | 1989-06-07 | Excluder type seal with sliding friction reducing feature |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/362,795 Expired - Lifetime US4986552A (en) | 1988-06-14 | 1989-06-07 | Excluder type seal with sliding friction reducing feature |
Country Status (5)
Country | Link |
---|---|
US (2) | US4974860A (en) |
EP (2) | EP0349147B1 (en) |
JP (1) | JPH0722532Y2 (en) |
KR (2) | KR950004688B1 (en) |
DE (2) | DE68909846T2 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5653448A (en) * | 1996-06-18 | 1997-08-05 | Dana Corporation | Slinger seal |
US20060021518A1 (en) * | 2004-07-30 | 2006-02-02 | Sijmen Sipma | Sealing construction |
US20090127795A1 (en) * | 2007-11-20 | 2009-05-21 | Lattime Scott B | Non-contact labyrinth seal assembly and method of construction thereof |
US20100247014A1 (en) * | 2009-03-30 | 2010-09-30 | Uchiyama Manufacturing Corp. | Sealing device |
US20100295254A1 (en) * | 2007-11-20 | 2010-11-25 | Masahiro Tabata | Sealing device |
US20120068419A1 (en) * | 2010-09-17 | 2012-03-22 | Freudenberg-Nok General Partnership | Zero Torque Membrane Seal |
CN104099695A (en) * | 2013-04-12 | 2014-10-15 | 索若德国两合股份有限公司 | Free-end spinning device and sealing member for free-end rotor spinning device |
US8864139B2 (en) | 2013-03-04 | 2014-10-21 | Federal-Mogul Corporation | Non-contact labyrinth seal assembly |
US20140339775A1 (en) * | 2011-12-21 | 2014-11-20 | Nok Corporation | Engine rear seal |
US20150001810A1 (en) * | 2013-06-26 | 2015-01-01 | Aes Engineering Ltd. | Dynamically Non Contacting Seal |
US20150276059A1 (en) * | 2012-10-23 | 2015-10-01 | Nok Corporation | Oil seal |
GB2529807A (en) * | 2014-08-26 | 2016-03-09 | Skf Ab | Dynamic radial seal |
US9291272B2 (en) | 2007-11-20 | 2016-03-22 | Federal-Mogul Corporation | Non-contact labyrinth seal assembly and method of construction thereof |
US10208801B1 (en) * | 2017-02-24 | 2019-02-19 | Chu Hung Oil Seals Industrial Co., Ltd. | Wheel hub seal |
US20210215200A1 (en) * | 2018-10-31 | 2021-07-15 | Nok Corporation | Surface processing method of disk member of sealing apparatus, and sealing apparatus |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2574692Y2 (en) * | 1990-10-18 | 1998-06-18 | 株式会社ダスキン | Mat with excellent anti-fraying properties |
JP2570086Y2 (en) * | 1991-10-28 | 1998-04-28 | いすゞ自動車株式会社 | Oil seal device for rotating shaft |
US5522456A (en) * | 1994-06-22 | 1996-06-04 | Geiger Technic, Inc. | Overflow with threaded plastic fillneck for surge tanks and overflow reservoirs |
US5692757A (en) * | 1994-07-19 | 1997-12-02 | Mather Seal Company | Bidirectional shaft seal with intersecting spiral grooves |
US5727095A (en) * | 1997-02-21 | 1998-03-10 | Setco Sales Co. | Bearing seal with uniform fluid purge |
US6217219B1 (en) | 1997-02-21 | 2001-04-17 | Setco Sales Co. | Bearing seal with uniform fluid purge |
US6109615A (en) * | 1998-06-05 | 2000-08-29 | Skf Usa Inc. | Plenum oil seal |
IT1303234B1 (en) * | 1998-08-18 | 2000-11-02 | Rft Spa | SEALING COMPLEX, IN PARTICULAR FOR VEHICLE CRANKSHAFTS. |
DE19841099C1 (en) * | 1998-09-09 | 2000-11-16 | Daimler Chrysler Ag | Radial shaft seal assembly has a ring-shaped body as a spray guard together with a dust guard to prevent oil leakage from the housing and the entry of dirt into a rear axle differential |
DE10334896A1 (en) * | 2003-07-29 | 2005-03-03 | Carl Freudenberg Kg | Sealing arrangement for a shaft comprises a radial shaft sealing ring with a sealing lip, and a shaft surface with a helical profiling leading the medium to be contained back into the sealed space |
DE602005009204D1 (en) * | 2004-07-09 | 2008-10-02 | Freudenberg Carl Kg | Shaft seal |
JP2006233991A (en) * | 2005-02-22 | 2006-09-07 | Nok Corp | Sealing device |
JP5158357B2 (en) * | 2008-06-09 | 2013-03-06 | Nok株式会社 | Sealing device |
JP2012229742A (en) * | 2011-04-26 | 2012-11-22 | Koyo Sealing Techno Co Ltd | Sealing device |
JP5807397B2 (en) * | 2011-06-06 | 2015-11-10 | 株式会社ジェイテクト | Sealing device |
JP6368152B2 (en) * | 2014-06-10 | 2018-08-01 | Nok株式会社 | Sealing device |
EP3385578B1 (en) * | 2015-11-30 | 2020-01-08 | NOK Corporation | Sealing device |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2418707A (en) * | 1944-05-27 | 1947-04-08 | Gen Electric | Lubricant seal |
US2478649A (en) * | 1945-12-29 | 1949-08-09 | Gen Electric | Fluid seal |
US2637574A (en) * | 1950-03-24 | 1953-05-05 | Victor Mfg & Gasket Co | Fluid seal |
US3038733A (en) * | 1958-10-10 | 1962-06-12 | Chicago Rawhide Mfg Co | Gap seal |
US3306683A (en) * | 1963-04-05 | 1967-02-28 | Goetzewerke | Seal for roller bearings in motor vehicles |
US3685838A (en) * | 1968-11-21 | 1972-08-22 | Forsheda Gummifabrik Ab | Seal between two parts, one of which is rotatable in relation to the other |
US3963248A (en) * | 1974-10-07 | 1976-06-15 | Garlock Inc. | Unitized dual lip seal |
US4252329A (en) * | 1979-02-26 | 1981-02-24 | Garlock Inc. | Semi-unitized shaft seal |
US4428586A (en) * | 1983-04-04 | 1984-01-31 | Chicago Rawhide Manufacturing Company | Combination wear sleeve and excluder lip adapted for easy installation |
US4448426A (en) * | 1981-07-06 | 1984-05-15 | Chicago Rawhide Manufacturing Company | Unitized oil seals |
US4513976A (en) * | 1984-06-06 | 1985-04-30 | Federal-Mogul Corporation | Rotating-lip grease seal |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
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US2902300A (en) * | 1956-10-29 | 1959-09-01 | Marlin Rockwell Corp | Shield for rotatable members |
US3070028A (en) * | 1961-05-08 | 1962-12-25 | Bell & Gossett Co | Air eliminator for rotary mechanical seals in fluid pumps |
GB1110234A (en) * | 1964-06-22 | 1968-04-18 | Angus George Co Ltd | Improvements in and relating to shaft seals |
US3510138A (en) * | 1965-10-15 | 1970-05-05 | Federal Mogul Corp | Oil seal with rock shield and wear sleeve |
US3838862A (en) * | 1968-10-31 | 1974-10-01 | Dowty Seals Ltd | Seals for use between two relatively-rotating surfaces |
US3703296A (en) * | 1970-05-20 | 1972-11-21 | Forsheda Gummifabrik Ab | Sealing between a rotary and a stationary member |
SE423138B (en) * | 1978-08-22 | 1982-04-13 | Volvo Ab | AXEL SEAL, INTENDED TO WORK AT HIGH TEMPERATURES |
DE3346073C2 (en) * | 1983-12-21 | 1986-10-30 | GMN Georg Müller Nürnberg GmbH, 8500 Nürnberg | Shaft seal |
JPS60136667A (en) * | 1983-12-24 | 1985-07-20 | Uchiyama Mfg Corp | Sealing apparatus |
US4484752A (en) * | 1984-03-08 | 1984-11-27 | Federal-Mogul Corporation | Rotating-lip bidirectional hydrodynamic oil seal |
IT8553275V0 (en) * | 1985-04-19 | 1985-04-19 | Riv Officine Di Villar Perosa | SEALING COMPLEX IN TWO PERFECTED TYPE ELEMENTS |
JPH0135982Y2 (en) * | 1985-05-08 | 1989-11-01 | ||
US4572516A (en) * | 1985-06-12 | 1986-02-25 | General Motors Corporation | Low friction dynamic seal assembly with centrifugal deflection |
SE454909B (en) * | 1986-11-12 | 1988-06-06 | Skf Ab | Centrifugal force regulated sealing device |
-
1988
- 1988-06-14 JP JP1988078534U patent/JPH0722532Y2/en not_active Expired - Lifetime
-
1989
- 1989-06-07 US US07/362,870 patent/US4974860A/en not_active Expired - Lifetime
- 1989-06-07 US US07/362,795 patent/US4986552A/en not_active Expired - Lifetime
- 1989-06-13 DE DE89305968T patent/DE68909846T2/en not_active Expired - Fee Related
- 1989-06-13 EP EP89305967A patent/EP0349147B1/en not_active Expired - Lifetime
- 1989-06-13 DE DE89305967T patent/DE68909850T2/en not_active Expired - Fee Related
- 1989-06-13 EP EP89305968A patent/EP0347175B1/en not_active Expired - Lifetime
- 1989-06-14 KR KR1019890008191A patent/KR950004688B1/en not_active IP Right Cessation
- 1989-06-14 KR KR1019890008192A patent/KR900000620A/en not_active Application Discontinuation
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2418707A (en) * | 1944-05-27 | 1947-04-08 | Gen Electric | Lubricant seal |
US2478649A (en) * | 1945-12-29 | 1949-08-09 | Gen Electric | Fluid seal |
US2637574A (en) * | 1950-03-24 | 1953-05-05 | Victor Mfg & Gasket Co | Fluid seal |
US3038733A (en) * | 1958-10-10 | 1962-06-12 | Chicago Rawhide Mfg Co | Gap seal |
US3306683A (en) * | 1963-04-05 | 1967-02-28 | Goetzewerke | Seal for roller bearings in motor vehicles |
US3685838A (en) * | 1968-11-21 | 1972-08-22 | Forsheda Gummifabrik Ab | Seal between two parts, one of which is rotatable in relation to the other |
US3963248A (en) * | 1974-10-07 | 1976-06-15 | Garlock Inc. | Unitized dual lip seal |
US4252329A (en) * | 1979-02-26 | 1981-02-24 | Garlock Inc. | Semi-unitized shaft seal |
US4448426A (en) * | 1981-07-06 | 1984-05-15 | Chicago Rawhide Manufacturing Company | Unitized oil seals |
US4448426B1 (en) * | 1981-07-06 | 1997-09-23 | Skf Usa Inc | Unitized oil seals |
US4428586A (en) * | 1983-04-04 | 1984-01-31 | Chicago Rawhide Manufacturing Company | Combination wear sleeve and excluder lip adapted for easy installation |
US4513976A (en) * | 1984-06-06 | 1985-04-30 | Federal-Mogul Corporation | Rotating-lip grease seal |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5653448A (en) * | 1996-06-18 | 1997-08-05 | Dana Corporation | Slinger seal |
US20060021518A1 (en) * | 2004-07-30 | 2006-02-02 | Sijmen Sipma | Sealing construction |
US7544917B2 (en) * | 2004-07-30 | 2009-06-09 | Tetra Laval Holdings & Finance S.A. | Sealing construction |
US20090127795A1 (en) * | 2007-11-20 | 2009-05-21 | Lattime Scott B | Non-contact labyrinth seal assembly and method of construction thereof |
US20100295254A1 (en) * | 2007-11-20 | 2010-11-25 | Masahiro Tabata | Sealing device |
US8342535B2 (en) | 2007-11-20 | 2013-01-01 | The Timken Company | Non-contact labyrinth seal assembly and method of construction thereof |
US8557904B2 (en) * | 2007-11-20 | 2013-10-15 | Jtekt Corporation | Sealing device |
US9291272B2 (en) | 2007-11-20 | 2016-03-22 | Federal-Mogul Corporation | Non-contact labyrinth seal assembly and method of construction thereof |
US20100247014A1 (en) * | 2009-03-30 | 2010-09-30 | Uchiyama Manufacturing Corp. | Sealing device |
US20120068419A1 (en) * | 2010-09-17 | 2012-03-22 | Freudenberg-Nok General Partnership | Zero Torque Membrane Seal |
US8403333B2 (en) * | 2010-09-17 | 2013-03-26 | Freudenberg-Nok General Partnership | Zero torque membrane seal |
US20140339775A1 (en) * | 2011-12-21 | 2014-11-20 | Nok Corporation | Engine rear seal |
US9638329B2 (en) * | 2011-12-21 | 2017-05-02 | Nok Corporation | Engine rear seal |
US9618117B2 (en) * | 2012-10-23 | 2017-04-11 | Nok Corporation | Oil seal |
US20150276059A1 (en) * | 2012-10-23 | 2015-10-01 | Nok Corporation | Oil seal |
US8864139B2 (en) | 2013-03-04 | 2014-10-21 | Federal-Mogul Corporation | Non-contact labyrinth seal assembly |
CN104099695A (en) * | 2013-04-12 | 2014-10-15 | 索若德国两合股份有限公司 | Free-end spinning device and sealing member for free-end rotor spinning device |
EP2806056A1 (en) * | 2013-04-12 | 2014-11-26 | Saurer Germany GmbH & Co. KG | Open-end spinning device and sealing element for an open-ended rotor spinning device |
US20150001810A1 (en) * | 2013-06-26 | 2015-01-01 | Aes Engineering Ltd. | Dynamically Non Contacting Seal |
US9915349B2 (en) * | 2013-06-26 | 2018-03-13 | Aes Engineering Ltd. | Dynamically non contacting seal |
GB2529807A (en) * | 2014-08-26 | 2016-03-09 | Skf Ab | Dynamic radial seal |
US10054229B2 (en) | 2014-08-26 | 2018-08-21 | Aktiebolaget Skf | Dynamic radial seal |
US10208801B1 (en) * | 2017-02-24 | 2019-02-19 | Chu Hung Oil Seals Industrial Co., Ltd. | Wheel hub seal |
US20210215200A1 (en) * | 2018-10-31 | 2021-07-15 | Nok Corporation | Surface processing method of disk member of sealing apparatus, and sealing apparatus |
US11698105B2 (en) * | 2018-10-31 | 2023-07-11 | Nok Corporation | Surface processing method of disk member of sealing apparatus, and sealing apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0722532Y2 (en) | 1995-05-24 |
EP0347175A1 (en) | 1989-12-20 |
EP0347175B1 (en) | 1993-10-13 |
DE68909846D1 (en) | 1993-11-18 |
EP0349147A1 (en) | 1990-01-03 |
KR900000619A (en) | 1990-01-30 |
KR950004688B1 (en) | 1995-05-04 |
DE68909846T2 (en) | 1994-02-10 |
DE68909850T2 (en) | 1994-02-10 |
JPH02471U (en) | 1990-01-05 |
KR900000620A (en) | 1990-01-30 |
US4986552A (en) | 1991-01-22 |
DE68909850D1 (en) | 1993-11-18 |
EP0349147B1 (en) | 1993-10-13 |
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